Stuffing-box



` (No Model.) 2 Sheets-Shed', '1. A T. WALKERI4 Stuffing Box.'

No 228,957. Patented june.15,1sso.

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INvENToR.

WITNESSMES (No Model.) 2 Sheets-Sheet 2.

' T. WALKER. Stuffing Box.

Patented June 15,1880.

FIGA.

N. IETERS, PHUTO-LITNDGRAFHER, WASHINGTON'D C.

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JMTED@ 1STATES PATENT Ormes..

THOMAS WALKER, OF PHILADELPHIA, PENNSYLVANIA.

STUFFING-BOX.

SPECIFICATION forming part of Letters Patent No. 228,957, dated June 15,1880.

Application filed April 2G, 1880.

To all whom 'it may concern:

Be it known Athat I, THOMAS VALKER, a citizenof the United States,residing` in Philadelphia, Pennsylvania, have invented certainImprovements in Stuting-Boxes for Steam- Engines, ot' which thefollowing is a specification.

The object of my invention is to make a metallic piston-rod packingwhich can be easily applied to the tubular projection of the cover of asteam cylinder or pump after removing` the usual follower or gland 5 afurther object of my invention being the ready removal ofthe packingwithout detaching the cover from the cylinder or pump; and astillfurther object is to prevent the leakage of steam between thepackin g-rin gs.

Inthe accompanying drawings, Figure l, Sheet 1, is a vertical section ofpart of a cylinder-cover with my improved packing; Fig. 2, a sectionalplan on the line l 2; Fig. 3, a detached view of one ofthe packing-segments 5 and Fig. 4, Sheet 2, sections of the several parts of thepacking' detached from each other.

In Fig. l A represents part of the cover of a steam cylinder or pump,and a the usual tubular projection for receiving the ordinary gland orfollower, which has beenremoved to make way for my improved packing. Thefixed part of this packing consists of the two annular plates B and C,the flanged sleeve D, and ring E, (bcstobserved in Sheet 2,) the yielding part of the packing consisting ot' the three pairs G, G', and G2 ofpacking-rin gs which hug the piston-rod, (shown by dotted lines inFig.1,) each ring being made preferably in three segments, the number ofwhich, however, may be increased to an extent suggested by the diameterof the piston-rod.

It may be stated here that the number of pairs of rings may also bevaried for a pistonrod of very small diameter. For instance, there maybe but one pair of packing-rings, and for a rod of very large diameterit may be advisable to use more than three pairs of rings.

The annular plate B is adapted to a recess in the top of the plate C,and when the former is fitted to the latter there is a chamber betweenthem 'or the reception of the upper pair of packing-rings. In likemanner, when the ange of the sleeve D has been iitted into (No model.)

a recess in the under side oi' the plate C there will be achaniberbetween the latter and a rib, ,0, in the sleeve, for the reception ofthe second pair of packing-rings, and a third chamber for a third pairof packing-rings, between the internal rib, c, ot' the sleeve D and thering E, which is fitted to the said sleeve and secured thereto bylateral screws or otherwise.

The sleeve D and ring E it snugly in the interior of the tubularprojection of the cover A, the ange of the cover resting on the top ofthe said projection, andthe stud-bolts b, which may have been used insecuring the ordinary gland, serving to secure the new packingplace.

An importa-nt advantage of my invention is the facility with which thepacking can be withdrawn when removal for any cause becomes necessary.

Many metallic packings are so constructed that their removal withoutfirst detaching the cover of the cylinder or pump is either difficult orimpossible; but this is not the case with my improved packing, for afterdetaching the nuts of the stud-bolts the annular plates B and C, withintervening packing-rings, can be withdrawn, and the remainder of thepacking can then be raised from' the interior of the projection c withcomparative ease.

As the several pairs of packing-rings are alike, a description of onepair only will sufce.

Each packing-ring is composed, in the present instance, of threesegments, w w w, a perspective view of one of which is shown in Fig. 3,on reference to which it will be seen that each segment is provided witha spring, m. Each ring is, in the first instance, continuous, and at thethree points where it has to be severed are bored three holes adapted tothe three pins y, after which the ring is severed through the center ofeach hole, and the result will be three segments, in each end of each ofwhich there is a semicircular recess.

In fitting the packing-rings to each chamber, first one set ot' threesegments is placed in the bottom of the said chamber, the pins y beingintroduced into their places between the segments, after which a secondset of three segments is placed in the chamber on the first, one of thesegments of one set having an ori- IOO ee for receiving a steady-pinprojecting from one of the segments of the other set, so thattherelative eircumferen tial position of the segments ofthe two ringscan never be changed, this relative position being' such that the endsof the segments of one set shall be midway, or thereabout, between theends ofthe segments of the other set, thereby breaking joints.

The segments are so made that when three are iitted together to form aring the space Within the ring will be somewhat less in diameter thanthe piston-rod when the latter is absent; hence, when the said rod is inplace there will be a continuous tendency of each ring, owing to thesprings of the segments, to hug the piston-rod.

The object of the pins introduced between the segments is twofold. Theyact as steadypins to maintain the scginents in their proper relativeposition 5 but their most important object is to bridge the spacesbetween the said segments and prevent leakage, for whatever maybe theextent ot' these spaces the pressure of such steam as may possibly gainaccess to the interior ofthe ring will be exerted against the pins y,and the latter, seeking a bearing against the segments,will necessarilyclose the spaces.

I claim as my inventionl. The combination, in a piston-rod packing, ofring-segments, each having a spring at the back anda semicircular recessin each end, with cylindrical pins y interposed between the recessedends of adjoining segments, said pins being as long as the segments arethick, all substantially as set forth. Y

2. The combination of the tubular projection a, the flanged sleeve D,having one or more sets of packing-rings, and the detachable an.

nnlar plate B, having a series of packing-rings independent ot' those ofthe sleeve D, as set forth.

3. The combination of the tubular projection et, the tlanged sleeve D,having an internal rib, c, the two sets ot' packing-rings G G2, the ringE, for contining the set of rings G2, and the annular plate C, forconfining the set of rings G to the sleeve D, and the latter to theprojection a, as set forth.

4. The combination of the tubular projection a, the stud-bolts b, theiian ged sleeve D, adaptedV to `projection a, and having one or morepairs of packingrings, the annular plate B, having an independent set ofpacking-rings, and the annular plate C, having in one side a recess forthe reception ot' the flanged end of the sleeve D, and in the other sidea recess 4for the reception ofthe plate B, as specified.

1n testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS NVALKE'R.

Witnesses:

JAMES F. ToBiN, HARRY SMITH.

